This application note illustrates different methodologies that can be used for capturing the load current characteristics of a device or the voltage discharge profile of a battery.

Generally, data logging is the capture of data for a specific duration of time. The data is then analyzed to determine the performance of a circuit board, module, or a product. The duration of testing time can last for minutes to months and often involves testing the product in extreme environmental conditions to accelerate the aging process. During the development and testing of electrical devices, current, voltage, power, and temperature are all common data points that may need to be stored. For simple devices with stable output under consistent load conditions, incremental data sampling at intervals of seconds to minutes is more than adequate. Devices with many, short duration power states may require much faster sampling. For wireless devices, such as Internet of Things (IoT) devices, power consumption is of utmost importance.

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